Study on lateral buckling characteristics of a submarine pipeline with a single arch symmetric initial imperfection

Zhang, Hong; Liu, Run; Liu, Wenbin; Yan, Shuwang

doi:10.1016/j.oceaneng.2015.07.049

Cited by 58 publications

(24 citation statements)

References 14 publications

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“…The solution for the pipeline deflection 1 , 2 can be presented in semi-explicit form by using Eq. (16) and Eq. (17) to express the coefficients i , i in terms of λ, 2 and all the parameters of the problem (see the Appendix).…”

Section: Relationship Between Andmentioning

confidence: 99%

“…Consequently, the integrity of pipelines within the buckle is improved. Lateral and upheaval buckling have been studied by previous researchers in the theoretical framework by modelling the pipeline as a beam resting on a rigid seabed [10][11][12][13][14][15][16][17] or on a soft seabed [18][19][20]. Nonlinear localised lateral buckling of straight pipelines was investigated analytically by Zhu et al [21] and Wang [22] without the assumption of lateral deformation.…”

Section: Introductionmentioning

confidence: 99%

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Analytical study of lateral thermal buckling for subsea pipelines with sleeper

Wang

Tang

Heijden

2018

Thin-Walled Structures

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Unburied subsea pipelines operating under high-temperature and high-pressure conditions tend to relieve their axial compressive force by forming lateral buckles. Uncontrolled lateral buckling may lead to pipeline failure. In order to control lateral buckling, a sleeper is often employed as a buckle-initiation technique. In this study, analytical solutions of lateral buckling for unburied subsea pipelines with sleeper are derived. An energy analysis is employed to investigate the stability of the buckled pipeline. The influence of sleeper height and sleeper friction on pipeline buckled configurations and typical lateral buckling behaviour is illustrated and analysed. The results are shown to be in very good agreement with experimental data in the literature. We also discuss the effect of imperfections and conduct an error analysis of one of the main assumptions of the proposed analytical method. Our results show that increasing the height of the sleeper or decreasing the friction between pipeline and sleeper can all be used to decrease the minimum critical temperature difference. However, only the sleeper height is effective in substantially reducing the maximum compressive stress.

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Section: Relationship Between Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical study of lateral thermal buckling for subsea pipelines with sleeper

Wang

Tang

Heijden

2018

Thin-Walled Structures

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“…Present industry practice estimates the soil resistance with the Coulomb friction model, which expresses the lateral soil resistance as the product of effective submerged weight of the pipeline and a friction coefficient lying in the range of 0.2-0.8 (Lambrakos, 1985;Lyons, 1973;Wagner et al, 1989). This means that the lateral soil resistance is regarded as constant, which has been employed to study the analytical solutions of lateral buckling for subsea pipelines by many researchers Hobbs, 1984;Hong et al, 2015a;Hong et al, 2015b;Li et al, 2016;Liu et al, 2014;Taylor and Gan, 1986b). Consistent deformation-dependent resistance force models were incorporated into the analyses of lateral buckling by Taylor and Gan (Taylor and Gan, 1986a) and Zhu et al (Zhu et al, 2015).…”

Section: Soil Resistancementioning

confidence: 99%

“…Wang and Shi (Shi et al, 2013;Wang et al, 2011) have investigated the upheaval buckling for ideal straight pipelines and for pipelines with prop imperfection on a plastic soft seabed. Moreover, analytical solutions were proposed and compared with finite-element solutions for high-order buckling modes of ideal pipelines and subsea pipelines with a single-arch initial imperfection (Hong et al, 2015b;Liu et al, 2014), which were all based on the classical lateral buckling modes proposed by Hobbs. Karampour and co-workers investigated the interaction between upheaval or lateral buckling and propagation buckling of subsea pipelines Karampour and Albermani, 2014;.…”

Section: Introductionmentioning

confidence: 99%

Localised lateral buckling of partially embedded subsea pipelines with nonlinear soil resistance

Wang

Heijden

2017

Thin-Walled Structures

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Unburied partially embedded subsea pipelines under high temperature conditions tend to relieve their axial compressive force by forming localised lateral buckles. This phenomenon is traditionally studied as a kind of imperfect column buckling problem. We study lateral buckling as a genuinely localised buckling phenomenon governed by a different static instability, with a different critical load. No ad hoc assumptions need to be made. We combine this buckling analysis with a detailed state-of-the-art nonlinear pipe-soil interaction model that accounts for the effect of lateral breakout resistance. This allows us to investigate the effect of initial embedment of subsea pipelines on their load-deflection behaviour. Parameter studies reveal a limit to the temperature difference for safe operation of the pipeline, in the sense that for higher temperature differences a localised buckling mode has lower total energy than the straight unbuckled pipe. Localised lateral buckling may then occur if the pipe is sufficiently imperfect or sufficiently dynamically perturbed.

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“…This formula has been applied to investigate the thermal buckling of semi-infinite long pipeline [4]. Various theoretical buckling models of pipelines under the complex service conditions have been developed in the past three decades [5][6][7][8]. The second is the numerical simulation on the buckling of the submarine pipelines.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation on Upheaval Buckling of Free-Span Submarine Pipeline

2019

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Submarine pipeline is widely used for the transportation of oil and gas in offshore exploration and production. The free span of pipeline is inevitable because of the complex seabed conditions, which may result in the upheaval buckling failure under the service conditions. In this paper, several experimental tests on scale models of submarine pipelines was carried out. The test results show that the length of the free span is closely related with the buckling of the pipeline. The upheaval buckling of pipelines is induced by the high compressive stress due to thermal action and triggered by the initial curvature due to self-weight. Thus, the traditional analysis and design method with effective length method cannot be used. Based on the experimental results, a simple and effective finite element model is developed and verified for parametric study. The numerical simulation results show that the diameter, length of free span and the self-weight of the pipeline will influence the buckling resistance of the pipeline system. The proposed finite element model can be used for the practical design of submarine pipelines.

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Study on lateral buckling characteristics of a submarine pipeline with a single arch symmetric initial imperfection

Cited by 58 publications

References 14 publications

Analytical study of lateral thermal buckling for subsea pipelines with sleeper

Analytical study of lateral thermal buckling for subsea pipelines with sleeper

Localised lateral buckling of partially embedded subsea pipelines with nonlinear soil resistance

Experimental and Numerical Investigation on Upheaval Buckling of Free-Span Submarine Pipeline

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